COMINGS AND GOINGS>>?Wal-Mart has named company veteran Doug McMillon its new president and CEO, effective Feb. 1. He succeeds Mike Duke.>> Tiffany & Co. chief financial officer Patrick ­McGuiness has resigned. Chief operating officer James ­Fernandez will serve as interim CFO until the company hires a replacement.>>?Michael Rae, CEO of the Responsible Jewellery Council, stepped down to pursue opportunities closer to his Melbourne, Australia, home. Until a successor is named, Catherine Sproule is serving as interim CEO.>>?Stuller CEO and president Jay Johnson retires Dec. 27. His successor is chief merchandising, marketing, and sales officer Danny Clark.Karen Goracke>>?Borsheims director of merchandising Karen Goracke has been named president and CEO of the Omaha, Neb., ­jeweler, ­effective Jan. 1. She replaces Susan Jacques, who will assume the role